Stackable carton



FIG. 1 is a top plan view of a stackable carton in an unassembled condition, showing my new design;

FIG. 2 is a greatly enlarged fragmentary perspective view, showing one corner thereof in a first assembled arrangement;

FIG. 3 is a greatly enlarged fragmentary perspective view similar to FIG. 2, showing a second alternate assembled arrangement; and,

FIG. 4 is a perspective view thereof in partially assembled condition.

The broken lines shown in all drawing views represent fold lines. 

The ornamental design for a stackable carton, as shown. 